Novel sedimentation tank bottom sludge discharge system

Abstract

The utility model relates to a novel sedimentation tank bottom sludge discharge system, which comprises a sedimentation part and a sludge discharge part from top to bottom, the sedimentation part comprises a water tank built by a water tank plate and a water tank frame, the upper part in the water tank is provided with a water collecting tank, the lower part in the water tank is provided with a water inlet pipe, the water collecting tank is connected with a water outlet pipe, and the sludge discharge part comprises a sludge discharge tank. The sludge discharge groove comprises a plurality of guide plates, the guide plate located in the middle of the sludge discharge groove is in an arch shape, the guide plates close to the two ends of the sludge discharge groove are in a semi-arch shape, and a sludge discharge pipe is arranged between every two adjacent guide plates. The arc plate is adopted as the bottom guide plate, compared with a traditional sludge discharging mode or an inclined hopper sludge discharging mode, the production cost and the maintenance cost are greatly reduced, meanwhile, due to the fact that the arc-shaped and semi-arc-shaped guide plates are arc-shaped, top planes do not exist, sludge is not prone to being deposited, and the downward inclination is larger, so that the sludge sliding efficiency is improved; the problem that most sludge is accumulated on the surface of the inclined plate and the bottom dead angle of a traditional sludge discharge groove is solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of water treatment equipment, and in particular relates to a novel sludge removal system at the bottom of a sedimentation tank. Background Technology

[0002] Sedimentation tanks are devices used to purify water by removing suspended solids through sedimentation. They are mainly used for wastewater treatment, post-treatment of biological treatment, and advanced treatment. Most common sedimentation tanks in existing technologies utilize the principle of inclined plates to increase the sedimentation area and extend the water flow path, thereby improving sedimentation efficiency. The bottom guide plate has a geometric cross-section, which can make full use of the limited volume of the sedimentation tank.

[0003] However, the existing stainless steel sedimentation tank sludge discharge channel technology in water plants still has the following drawbacks: Complex installation and maintenance: The installation of the inclined plate sludge discharge channel requires precise positioning and fixing. Furthermore, due to insufficient strength of the inclined plate, additional reinforcing ribs are needed to ensure that the sludge does not deform when it accumulates, thereby ensuring uniform water flow and smooth sludge descent; High cost: The construction and maintenance costs of the inclined plate sludge discharge channel are relatively high. In addition, relying on gravity requires additional pumps to deliver the equipment for discharge and flow, and manual cleaning is necessary if the effect is unsatisfactory, increasing costs and energy consumption; Incomplete sludge discharge: Although utilizing the terrain helps the sludge to slide naturally, in actual operation, incomplete sludge discharge may still occur, especially when the sludge viscosity is high or the moisture content is low, which may cause sludge to accumulate on the inclined plate, affecting the sedimentation effect. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a novel bottom sludge discharge system for sedimentation tanks, which prevents sludge from accumulating on the guide plates and improves the sedimentation effect.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to provide a novel sedimentation tank bottom sludge discharge system, which includes a sedimentation section and a sludge discharge section from top to bottom. The sedimentation section includes a water tank constructed from a water tank plate and a water tank frame. The upper part of the water tank is provided with a water collection trough and the lower part is provided with a water inlet pipe. The water collection trough is connected to the water outlet pipe. The sludge discharge section includes a sludge discharge trough. The sludge discharge trough includes several guide plates. The guide plate located in the middle of the sludge discharge trough is arched, and the guide plates near both ends of the sludge discharge trough are semi-arched. A sludge discharge pipe is provided between adjacent guide plates.

[0006] Preferably, the water outlet pipe is located at the bottom of the water collection tank and extends outward from the water tank through a bend. The portion of the water outlet pipe outside the water tank is supported by a pipe bracket and fixed to one side of the water tank.

[0007] Preferably, the sedimentation section further includes a water distribution area and an inclined tube area separated by a water distribution plate. The bottom of the water distribution area is connected to the sludge discharge section. The inclined tube area is located on one side of the water distribution area and its bottom is connected to the sludge discharge section. The water inlet pipe is connected to the water distribution area. The inclined tube area is provided with a plurality of inclined packing pipes, which are filled with packing material. The water collection tank is located at the upper part of the inclined tube area.

[0008] Preferably, a backwash pipe is provided on one side of the water tank.

[0009] Preferably, the surface of the sludge discharge pipe has several sludge discharge holes that are obliquely downward along its length.

[0010] Preferably, the water tank and the bottom of the inclined tube are provided with internal reinforcing ribs.

[0011] The beneficial effects are as follows: The bottom guide plate of this utility model adopts an arc-shaped sludge discharge method, which significantly reduces production and maintenance costs compared to traditional sludge discharge methods or inclined bucket sludge discharge methods. Simultaneously, because the arched and semi-arched guide plates are arc-shaped and lack a flat top, sludge is less likely to accumulate. Furthermore, the slope increases towards the bottom, improving the efficiency of sludge sliding down and solving the problem of most sludge accumulating on the surface of the inclined plate and in the dead corners at the bottom of traditional sludge discharge troughs. To structurally avoid sludge blockage on the sides of the entire sludge discharge trough, a single-sided semi-arched guide plate is designed, facilitating effective sludge discharge from all areas. Attached Figure Description

[0012] Figure 1 This is a three-dimensional diagram of a novel sedimentation tank bottom sludge removal system.

[0013] Figure 2 This is a cross-sectional view of a novel sedimentation tank bottom sludge discharge system.

[0014] Figure 3 for Figure 1 Enlarged 3D view of the middle sludge section.

[0015] Among them, 1-water tank frame; 2-guide plate; 3-water outlet pipe; 4-pipe support; 5-water collection trough; 6-sludge discharge section; 7-slanted pipe; 8-internal reinforcing rib; 9-water distribution plate; 10-backwash pipe; 11-sludge discharge pipe; 12-water inlet pipe.

[0016] The same markings in each diagram represent the same component. Detailed Implementation

[0017] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0018] This utility model provides a novel bottom sludge removal system for a sedimentation tank, comprising a sedimentation section and a sludge removal section 6 from top to bottom. The sedimentation section includes a water tank constructed from a tank plate and a tank frame 1. The upper part of the water tank has a water collection trough 5, and the lower part has a water inlet pipe 12. The water collection trough 5 is connected to a water outlet pipe 3. The sludge removal section 6 includes a sludge removal channel, which includes several guide plates 2. The guide plate 2 located in the middle of the sludge removal channel is arched, while the guide plates 2 near both ends of the sludge removal channel are semi-arched. A sludge removal pipe 11 is provided between adjacent guide plates 2. Several sludge removal holes are opened diagonally downwards along the length of the sludge removal pipe 11. One end of the sludge removal pipe 11, extending out of the sludge removal section 6, is connected to a suction pump.

[0019] like Figure 1 , 2 In one specific embodiment shown in Figure 3, the water outlet pipe 3 is located at the bottom of the water collection tank 5 and extends outward through the water tank via a bend. The portion of the water outlet pipe 3 located outside the water tank is supported by a pipe bracket 4 and fixed to one side of the water tank.

[0020] To improve the sedimentation effect of the sedimentation section, in one specific embodiment, the sedimentation section further includes a water distribution area and an inclined tube area separated by a water distribution plate 9. The bottom of the water distribution area is connected to the sludge discharge section 6, and the inclined tube area is located on one side of the water distribution area and its bottom is connected to the sludge discharge section 6.

[0021] The water inlet pipe 12 is connected to the water distribution area. The water distribution plate 9 is arranged obliquely downward and attached to the sludge discharge pipe at one end. The water distribution plate 9 is a flat plate with several through holes arranged in an array on its surface, which helps to make the originally concentrated water flow evenly through the water distribution plate 9 to flow to the bottom of the sedimentation area.

[0022] The inclined tube area is provided with several inclined packing tubes 7, which are filled with packing material. When water flows from the bottom to the top of the packing tubes 7, it is further filtered by the packing material inside. The water collection tank 5 is located at the top of the inclined tube area. The water tank and the bottom of the packing tubes 7 are provided with internal reinforcing ribs 8 to support the packing tubes 7.

[0023] In the conventional water production stage: the raw water after chemical coagulation enters the sedimentation section through the inlet pipe 12. Since the height of the inlet pipe 12 is above the holes of the distribution plate 9, the incoming water will first sink due to gravity and finally accumulate at the bottom. After that, it will be evenly transported to the sedimentation zone where the inclined tube packing is located through the holes below the distribution plate 9. After sedimentation and filtration, most of the clear water will overflow into the uppermost water collection tank 5 due to the water pressure effect, and then flow out through the outlet pipe 3 and enter the next treatment stage.

[0024] In one specific embodiment, a backwash pipe 10 is provided on one side of the water tank to backwash the present invention when needed. During the backwashing stage: after the raw water is transported into the sedimentation zone, due to the action of gravitational potential energy, the accumulated sludge generated in the water after the front-end coagulation and chemical addition will slide down along the side of the packing pipe 7 into the sludge discharge trough, and then accelerate to the bottom of the sedimentation tank along the guide plate 2 with the gradually increasing slope. At this time, the sludge discharge pipe 11 is opened according to the sludge accumulation, and the sludge at the bottom is sucked out through the sludge discharge holes on both sides of the sludge discharge pipe 11. Since a large amount of impurities will accumulate in the holes of the water distribution plate 9 after long-term filtration, the backwash pipe 10 is opened at this time, and the inlet area is flushed by directly connecting the backwash water pump. Some of the impurities accumulated on the top of the guide plate 2 can also be flushed into the sludge discharge pipe 11 through backwashing, achieving the effect of backwashing.

Claims

1. A novel bottom sludge removal system for sedimentation tanks, characterized in that, The structure, from top to bottom, includes a sedimentation section and a sludge discharge section. The sedimentation section includes a water tank constructed from a tank plate and a tank frame. The upper part of the water tank is provided with a water collection trough, and the lower part is provided with a water inlet pipe. The water collection trough is connected to the water outlet pipe. The sludge discharge section includes a sludge discharge trough, which includes several guide plates. The guide plate located in the middle of the sludge discharge trough is arched, and the guide plates near both ends of the sludge discharge trough are semi-arched. A sludge discharge pipe is provided between adjacent guide plates.

2. The novel sedimentation tank bottom sludge removal system according to claim 1, characterized in that, The water outlet pipe is located at the bottom of the water collection tank and extends outward through the water tank via a bend. The portion of the water outlet pipe outside the water tank is supported by a pipe bracket and fixed to one side of the water tank.

3. The novel sedimentation tank bottom sludge removal system according to claim 1, characterized in that, The sedimentation section also includes a water distribution area and an inclined tube area separated by a water distribution plate. The bottom of the water distribution area is connected to the sludge discharge section. The inclined tube area is located on one side of the water distribution area and its bottom is connected to the sludge discharge section. The water inlet pipe is connected to the water distribution area. Several inclined packing pipes are provided in the inclined tube area. The packing pipes are filled with packing material. The water collection tank is located at the top of the inclined tube area.

4. The novel sedimentation tank bottom sludge discharge system according to claim 1, characterized in that, A backwash pipe is provided on one side of the water tank.

5. A novel sedimentation tank bottom sludge discharge system according to claim 1, characterized in that, The surface of the mud discharge pipe has several mud discharge holes that are opened diagonally downward along its length.

6. A novel sedimentation tank bottom sludge discharge system according to claim 3, characterized in that, The water tank and the bottom of the packing tube are provided with internal reinforcing ribs.

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